/**
* S -> a S e
* S -> B
* B -> b B e
* B -> C
* C -> c C e
* C -> d
*/
public static function productions()
{
$productions = [];
$productions[] = new StandardProduction(StandardSymbol::nonTerminal('S'), new Concatenation(ExpressionSymbol::createAdapterForTerminal('a'), [ExpressionSymbol::createAdapterForNonTerminal('S'), ExpressionSymbol::createAdapterForTerminal('e')]));
$productions[] = new StandardProduction(StandardSymbol::nonTerminal('S'), ExpressionSymbol::createAdapterForNonTerminal('B'));
$productions[] = new StandardProduction(StandardSymbol::nonTerminal('B'), new Concatenation(ExpressionSymbol::createAdapterForTerminal('b'), [ExpressionSymbol::createAdapterForNonTerminal('B'), ExpressionSymbol::createAdapterForTerminal('e')]));
$productions[] = new StandardProduction(StandardSymbol::nonTerminal('B'), ExpressionSymbol::createAdapterForNonTerminal('C'));
$productions[] = new StandardProduction(StandardSymbol::nonTerminal('C'), new Concatenation(ExpressionSymbol::createAdapterForTerminal('c'), [ExpressionSymbol::createAdapterForNonTerminal('C'), ExpressionSymbol::createAdapterForTerminal('e')]));
$productions[] = new StandardProduction(StandardSymbol::nonTerminal('C'), ExpressionSymbol::createAdapterForTerminal('d'));
return $productions;
}
/**
* @param string $identifier
* @return ExpressionSymbol
*/
public function createNonTerminal($identifier)
{
return ExpressionSymbol::createAdapterForNonTerminal($identifier);
}
